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Need help on Apache URL rewrite

Posted on 2006-11-10
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Last Modified: 2010-03-04
I am considering to write some rewrite rules in a .htaccess file that meets the following conditions:

when user requests an url like :  http://localhost/img.php?w=12&h=21&d=5
apache would check whether  the file named "images/img_12_21_5.jpg" exists, if yes, just rediect to the file; however if no, the browser will redirect to a file named "images/blank.gif";

Can it be implemented just using apache rewrite rules? Thank you.
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Question by:klemperer
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ravenpl earned 375 total points
ID: 17920674
RewriteEngine On
RewriteCond %{QUERY_STRING} ^w=12&h=21&d=5$ //match exatly
RewriteRule ^img.php$ /images/img_12_21_5.jpg //rewrite to the new file
RewriteCond %{REQUEST_FILENAME} ! -s //not exist or empty
RewriteRule ^images/.*\.jpg /images/blank.jpg [L] //don't try next rewrites, redirect any non existent images/*.jpg

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by:ravenpl
ID: 17921150
And why B?
I can help if something wrong here.
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